audit work, fixed StellaOps.sln warnings/errors, fixed tests, sprints work, new advisories

src/Concelier/StellaOps.Concelier.WebService/Extensions/AdvisorySummaryMapper.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 using System.Collections.Immutable;
+using System.Globalization;
 using System.Linq;
 using StellaOps.Concelier.Core.Linksets;
 using StellaOps.Concelier.WebService.Contracts;
@@ -35,7 +36,7 @@ internal static class AdvisorySummaryMapper
                 ObservationIds: linkset.ObservationIds.ToArray(),
                 Schema: "lnm-1.0"),
             Aliases: aliases.ToArray(),
-            ObservedAt: linkset.CreatedAt.UtcDateTime.ToString("O"));
+            ObservedAt: linkset.CreatedAt.UtcDateTime.ToString("O", CultureInfo.InvariantCulture));
     }
 
     public static AdvisorySummaryResponse ToResponse(

src/Concelier/StellaOps.Concelier.WebService/Extensions/FeedSnapshotEndpointExtensions.cs

@@ -226,7 +226,7 @@ internal static class FeedSnapshotEndpointExtensions
             exportOptions,
             cancellationToken).ConfigureAwait(false);
 
-        if (metadata is null)
+        if (metadata is null || metadata.ExportPath is null)
         {
             return ConcelierProblemResultFactory.SnapshotNotFound(context, snapshotId);
         }

src/Concelier/StellaOps.Concelier.WebService/Services/IncidentFileStore.cs

@@ -1,3 +1,4 @@
+using System.Globalization;
 using System.Text.Json;
 using StellaOps.Concelier.WebService.Options;
 
@@ -76,8 +77,8 @@ internal static class IncidentFileStore
             payload.AdvisoryKey,
             payload.Tenant,
             payload.Reason,
-            payload.ActivatedAt.ToUniversalTime().ToString("O"),
-            payload.CooldownUntil.ToUniversalTime().ToString("O"),
+            payload.ActivatedAt.ToUniversalTime().ToString("O", CultureInfo.InvariantCulture),
+            payload.CooldownUntil.ToUniversalTime().ToString("O", CultureInfo.InvariantCulture),
             payload.PipelineVersion,
             active);
     }